/*
 * This file is part of Cleanflight.
 *
 * Cleanflight is free software. You can redistribute
 * this software and/or modify this software under the terms of the
 * GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * Cleanflight is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software.
 *
 * If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include "common/time.h"

#include "pg/motor.h"

#define DSHOT_MIN_THROTTLE       48
#define DSHOT_MAX_THROTTLE     2047
#define DSHOT_3D_FORWARD_MIN_THROTTLE 1048

#define MIN_GCR_EDGES         7
#define MAX_GCR_EDGES         22

// comment out to see frame dump of corrupted frames in dshot_telemetry_info
//#define DEBUG_BBDECODE

#ifdef USE_DSHOT_TELEMETRY_STATS
#define DSHOT_TELEMETRY_QUALITY_WINDOW 1       // capture a rolling 1 second of packet stats
#define DSHOT_TELEMETRY_QUALITY_BUCKET_MS 100  // determines the granularity of the stats and the overall number of rolling buckets
#define DSHOT_TELEMETRY_QUALITY_BUCKET_COUNT (DSHOT_TELEMETRY_QUALITY_WINDOW * 1000 / DSHOT_TELEMETRY_QUALITY_BUCKET_MS)

typedef struct dshotTelemetryQuality_s {
    uint32_t packetCountSum;
    uint32_t invalidCountSum;
    uint32_t packetCountArray[DSHOT_TELEMETRY_QUALITY_BUCKET_COUNT];
    uint32_t invalidCountArray[DSHOT_TELEMETRY_QUALITY_BUCKET_COUNT];
    uint8_t lastBucketIndex;
}  dshotTelemetryQuality_t;

extern dshotTelemetryQuality_t dshotTelemetryQuality[MAX_SUPPORTED_MOTORS];
#endif // USE_DSHOT_TELEMETRY_STATS

typedef struct dshotProtocolControl_s {
    uint16_t value;
    bool requestTelemetry;
} dshotProtocolControl_t;

void dshotInitEndpoints(const motorConfig_t *motorConfig, float outputLimit, float *outputLow, float *outputHigh, float *disarm, float *deadbandMotor3dHigh, float *deadbandMotor3dLow);
float dshotConvertFromExternal(uint16_t externalValue);
uint16_t dshotConvertToExternal(float motorValue);

uint16_t prepareDshotPacket(dshotProtocolControl_t *pcb);

#ifdef USE_DSHOT_TELEMETRY
extern bool useDshotTelemetry;

typedef struct dshotTelemetryMotorState_s {
    uint16_t telemetryValue;
    bool telemetryActive;
} dshotTelemetryMotorState_t;


typedef struct dshotTelemetryState_s {
    bool useDshotTelemetry;
    uint32_t invalidPacketCount;
    uint32_t readCount;
    dshotTelemetryMotorState_t motorState[MAX_SUPPORTED_MOTORS];
    uint32_t inputBuffer[MAX_GCR_EDGES];
} dshotTelemetryState_t;

extern dshotTelemetryState_t dshotTelemetryState;

#ifdef USE_DSHOT_TELEMETRY_STATS
void updateDshotTelemetryQuality(dshotTelemetryQuality_t *qualityStats, bool packetValid, timeMs_t currentTimeMs);
#endif
#endif

uint16_t getDshotTelemetry(uint8_t index);
bool isDshotMotorTelemetryActive(uint8_t motorIndex);
bool isDshotTelemetryActive(void);

int16_t getDshotTelemetryMotorInvalidPercent(uint8_t motorIndex);
